You can find a lot of sites about the Sierpinski triangle on the Internet.
Here is a list of those who help me to write this report :
 

http://math.bu.edu/DYSYS/chaos-game/node1.html : about the Chaos game

http://a.trevano.ch/%7Esreffert/SIERPINSKI/Main.html : Java applets about the Sierpinski triangle

http://www-history.mcs.st-andrews.ac.uk/history/Mathematicians/Sierpinski.html : Mathematicians biographies